１，我爸媽申請－綠卡申請未婚成年子女
２，我申請－公民申請兄弟姐妹
第一種方法：排期時間相對較短（和２比，快大概３,4年），缺點是父母沒收入，無資產，（我可以一起擔保），不知成功的可能性有多少, 操作難度有多大？
-That will not be a problem because you can be the co-sponsor if one of your parents is a sponsor for your brother's GC application. The problem is that if your brother get married before he get the immigration visa, then this I-130 will be void.
第二種方法：比較穩妥，但排期時間太長。
懇請大家幫我分析一下，可以同時遞交兩種移民申請嗎，不是貪心主要考濾是如果１失敗還有２。如果不行，那種比較好，更適合我們？
-I suggest do both at the same time and that means you and one of parents file two separate I-130s for your brother's GC applicaiton in case your brother may get married some day before he get the visa, and thus he and his family still can get the immigration visa under your sponsor.
